The utility model provides a boring rod filter with a protective cover. The boring rod filter is used for filtering impurities carried by drilling fluid during the well-drilling process of petroleum and natural gas. The boring rod filter with the protective cover comprises a bolt, a fixed joint, a fixed frame, a fixed seat, a nut, a fixed sleeve, the filter, a cover, a conical protrusion block, a small filter plate and a large filter plate. The bolt passes through the central hole at the upper end of the fixed joint and is connected with the nut; two ends of the fixed frame are respectively welded with the fixed joint and the fixed seat; the fixed seat is welded with the filter and is connected with the fixed sleeve by a thread simultaneously; the fixed sleeve is welded with the cover; the filter is welded with the small filter plate; the cover is welded with the large filter plate; and the conical protrusion block passes through the central hole of the small filter plate and is welded with the large filter plate. In the utility model, the impurities in the drilling liquid during the well-drilling process can be filtered, the boring rod can be well protected by the protective function of the cover, the washing of the drilling liquid on the boring rod can be avoided, the service life of the boring rod can be prolonged, and the occurrence of the underground mining accident is reduced.